I can abide a film that doesn't provide background to futuristic possibilities (how did they get to this life?) but to deny the crux of the story and leave it to the reader/watcher to figure it out is anti-climatic and leaves me thinking the writer(s) could't figure it out themselves. "I guess she saw this -or maybe that" isn't a game I personally want to play. But it did hold my attention and for that, I rate as I did.